53306021 has 8 divisors (see below), whose sum is σ = 53916480. Its totient is φ = 52699392.

The previous prime is 53306017. The next prime is 53306023. The reversal of 53306021 is 12060335.

53306021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 53306021 - 2² = 53306017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 53305984 and 53306002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53306023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33776 + ... + 35318.

It is an arithmetic number, because the mean of its divisors is an integer number (6739560).

Almost surely, 2^53306021 is an apocalyptic number.

It is an amenable number.

53306021 is a deficient number, since it is larger than the sum of its proper divisors (610459).

53306021 is a wasteful number, since it uses less digits than its factorization.

53306021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1915.

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 53306021 is about 7301.0972463048. The cubic root of 53306021 is about 376.3501458566.

Adding to 53306021 its reverse (12060335), we get a palindrome (65366356).

The spelling of 53306021 in words is "fifty-three million, three hundred six thousand, twenty-one".